Tài liệu J2EE and EJB ppt

07:00 PM 07:00 PM 1/23 J2EE and EJB Chuyên đề Lập trình Java & J2EE Chương 12+ Biên soạn: Th.S Nguyễn văn Lành 07:00 PM 07:00 PM 2/23 Objectives  Overview of J2EE  What is J2EE?  J2EE Containers  J2EE Platform Roles  J2EE Technologies  Benefits of J2EE 07:00 PM 07:00 PM 3/23 Objectives  Overview on EJB  Distributed Component model  EJB Architecture  Session bean  Stateless session bean  Stateful session bean  Entity bean  Bean-Managed Persistance  Container-Managed Persistance 07:00 PM 07:00 PM 4/23 What is J2EE?  multitiered distributed application model  Specification, not a product  Sun controls the J2EE specification  IBM's WebSphere and BEA's WebLogic account for 59% of the J2EE market  Container-Based Component Management  Support for Business Logic Components 07:00 PM 07:00 PM 5/23 J2EE component  a self-contained functional software unit that is assembled into a J2EE application.  The J2EE specication denes the following J2EE components:  Application clients and applets  Java Servlet and JavaServer Pages (JSP)  Enterprise JavaBeans (EJB) components (enterprise beans) are business components that run on the server 07:00 PM 07:00 PM 6/23 J2EE Containers  J2EE server provides underlying services in the form of a container for every component type  JNDI lookup services  Security  Transaction Management  Remote connectivity  Life cycle management  Deployment services 07:00 PM 07:00 PM 7/23 J2EE Platform Roles  J2EE Product Provider  Tool Provider  Application Component Provider  Application Assembler  Application Deployer  Administrator 07:00 PM 07:00 PM 8/23 J2EE Technologies 07:00 PM 07:00 PM 9/23 J2EE Platform Benefits  Simplified architecture and development  Freedom of choice in servers, tools, and components  Integration with existing information systems  Scalability  Flexible security model 07:00 PM 07:00 PM 10/23 The whole picture [...]... applications 14/23 EJB Architecture  Home Interface   Remote/Component Interface   Provide methods for create, remove instances of EJB and find entity bean defines the set of business methods available to clients Enterprise Bean Class  The actual implementation of the business methods of the bean and other responsbility 07:00 PM 15/23 EJB Architecture  EJB Container    The EJB Container is... abstraction that manages one or more EJB classes or instances Provide container services to EJB instances EJB Server  manages EJB containers along with providing access to system services 07:00 PM 16/23 The whole picture 07:00 PM 17/23 Session Bean    Implements a business task represents a transient conversation with a client and might execute database reads and writes within a transaction two... Specification, v1.3 J2EE Tutorial from Sun Microsystems 07:00 PM 22/23 Summary   The primary focus of J2EE is provide a set of component technologies (Enterprise JavaBeans technology, JavaServer Pages technology, and Java servlets technology) that simplify the process of developing enterprise applications The J2EE platform provides a number of system-level services that simplify application programming and allow... 07:00 PM 12/23 Overview on EJB  Entity beans   Message-driven beans   represent an object-oriented view of some entities that are stored in persistent storage, such as a database process asynchronous messages delivered via the Java Message Service (JMS) API Enterprise beans live inside EJB containers, which provide life cycle management, transactions, security, persistence, and a variety of other... portability Provides for faster development 07:00 PM 20/23 EJB & J2EE setup  Software     J2SDKEE1.3 Editplus SQL Server Setup requirements 07:00 PM 21/23 References      Mastering Enterprise JavaBeans, 2nd editionby Ed Roman 2002 Enterprise JavaBeansTM Specification, Version 2.1 from Sun Microsystem 3/2003 Designing Enterprise Applications with the J2EE Platform, 2nd Edition 2002 by Sun Microsystems,...Overview on EJB  Enterprise JavaBean     equivalent to COM+ from NET a distributed component model Based on RMI-IIOP protocol link between presentation components hosted by the Web tier and business-critical data in the enterprise information system tier 07:00 PM 11/23 Overview on EJB  Three kinds of enterprise beans:     session beans entity... variety of other services for them 07:00 PM 13/23 JavaBeans vs EJBs       Java Beans Client-side component model Beans tell you what they can do Beans have no run time dependencies Beans are usually local Well suited to developing GUI applications 07:00 PM       Enterprise Beans Server-side component model Implement required interfaces and methods Execute within a container Usually remote Well . J2EE  What is J2EE?  J2EE Containers  J2EE Platform Roles  J2EE Technologies  Benefits of J2EE 07:00 PM 07:00 PM 3/23 Objectives  Overview on EJB  Distributed. 1/23 J2EE and EJB Chuyên đề Lập trình Java & J2EE Chương 12+ Biên soạn: Th.S Nguyễn văn Lành 07:00 PM 07:00 PM 2/23 Objectives  Overview of J2EE  What